sm1350 Nippon Precision Circuits Inc, (NPC), sm1350 Datasheet - Page 3

• Manufacturer Part Number: sm1350
• Description: High Tone Quality Melody Lsi
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

PIN DESCRIPTION
1. U = pull-up resistor connection, SU = pull-up resistor connection only when melody output starts,
2. BTL/A-class output mode is selected by mask option.
P = p-channel open drain, C = complementary output.
U or O = pull-up resistance or open drain (master slice)
Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
BUSYN
MODE
MSBN
Name
STOP
MSB
VDD
SPN
STN
VSS
VOL
T1N
T2N
T3N
XTN
ICN
TO
S0
S1
S2
S3
LH
CT
SP
XT
I/O
O
O
O
O
O
O
O
O
−
−
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
U or O
U or O Melody start control
State
SU
SU
SU
SU
SU
SU
−
C
C
U
−
−
P
P
C
U
C
U
U
U
C
−
−
1
Supply pin
Binary select mode: Phrase select pins.
Serial select mode: S0 and S1 control melody output.
Melody select mode control. Binary mode when LOW, and serial mode when HIGH.
Melody output mode control. One-shot when LOW, and level hold when HIGH.
One-shot melody mode: Melody output stop control.
Level hold melody mode: Invalid input.
Busy output signal. LOW when a melody is output.
External control pulse output
Initialization clear input
Ground pin
Volume adjust control. Volume adjusted using an external resistor.
9-bit D/A converter output in BTL output mode.
VOL current output in A-class output mode.
BTL output mode: 9-bit D/A converter output.
A-class output mode: 10-bit D/A converter output.
BTL output mode: Signed-bit output. HIGH when no melody is output.
A-class output mode: BUSYIN input
BTL output mode: Signed-bit output. HIGH when no melody is output.
A-class output mode: ENDN output. HIGH when no melody is output.
Test signal inputs
Test signal output. 62.5 kHz output when not in test mode.
Oscillator output
Oscillator input
SM1350 series
Description
NIPPON PRECISION CIRCUITS INC.—3
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